We first measure system-wide power draw from the wall while the card is sat idling at the Windows 10 desktop for 5 minutes. Gaming power draw is recorded by running the Deus Ex benchmark at 4K. As a maximum stress test, Fire Strike Ultra Stress Test is run 5 consecutive times and the cards’ power draws are recorded.
The Gaming X Trio is relatively power-hungry – pulling around 80 Watts more than Nvidia's FE card while under load.
To me, this is not very significant as the increased clock speed is always going to result in more power being consumed – that is the price you pay for having a faster graphics card. If you are spending £769 on a graphics card, the increased electricity bill is unlikely to bother you either.